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[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / qla4xxx / ql4_os.c
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7 #include <linux/moduleparam.h>
8
9 #include <scsi/scsi_tcq.h>
10 #include <scsi/scsicam.h>
11
12 #include "ql4_def.h"
13
14 /*
15 * Driver version
16 */
17 char qla4xxx_version_str[40];
18
19 /*
20 * SRB allocation cache
21 */
22 static struct kmem_cache *srb_cachep;
23
24 /*
25 * Module parameter information and variables
26 */
27 int ql4xdiscoverywait = 60;
28 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
29 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
30 int ql4xdontresethba = 0;
31 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
32 MODULE_PARM_DESC(ql4xdontresethba,
33 "Dont reset the HBA when the driver gets 0x8002 AEN "
34 " default it will reset hba :0"
35 " set to 1 to avoid resetting HBA");
36
37 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
38 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
39 MODULE_PARM_DESC(ql4xextended_error_logging,
40 "Option to enable extended error logging, "
41 "Default is 0 - no logging, 1 - debug logging");
42
43 /*
44 * SCSI host template entry points
45 */
46
47 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
48
49 /*
50 * iSCSI template entry points
51 */
52 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
53 uint32_t enable, struct sockaddr *dst_addr);
54 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
55 enum iscsi_param param, char *buf);
56 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
57 enum iscsi_param param, char *buf);
58 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
59 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
60 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
61
62 /*
63 * SCSI host template entry points
64 */
65 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
66 void (*done) (struct scsi_cmnd *));
67 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
68 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
69 static int qla4xxx_slave_alloc(struct scsi_device *device);
70 static int qla4xxx_slave_configure(struct scsi_device *device);
71 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
72
73 static struct scsi_host_template qla4xxx_driver_template = {
74 .module = THIS_MODULE,
75 .name = DRIVER_NAME,
76 .proc_name = DRIVER_NAME,
77 .queuecommand = qla4xxx_queuecommand,
78
79 .eh_device_reset_handler = qla4xxx_eh_device_reset,
80 .eh_host_reset_handler = qla4xxx_eh_host_reset,
81
82 .slave_configure = qla4xxx_slave_configure,
83 .slave_alloc = qla4xxx_slave_alloc,
84 .slave_destroy = qla4xxx_slave_destroy,
85
86 .this_id = -1,
87 .cmd_per_lun = 3,
88 .use_clustering = ENABLE_CLUSTERING,
89 .sg_tablesize = SG_ALL,
90
91 .max_sectors = 0xFFFF,
92 };
93
94 static struct iscsi_transport qla4xxx_iscsi_transport = {
95 .owner = THIS_MODULE,
96 .name = DRIVER_NAME,
97 .param_mask = ISCSI_CONN_PORT |
98 ISCSI_CONN_ADDRESS |
99 ISCSI_TARGET_NAME |
100 ISCSI_TPGT,
101 .sessiondata_size = sizeof(struct ddb_entry),
102 .host_template = &qla4xxx_driver_template,
103
104 .tgt_dscvr = qla4xxx_tgt_dscvr,
105 .get_conn_param = qla4xxx_conn_get_param,
106 .get_session_param = qla4xxx_sess_get_param,
107 .start_conn = qla4xxx_conn_start,
108 .stop_conn = qla4xxx_conn_stop,
109 .session_recovery_timedout = qla4xxx_recovery_timedout,
110 };
111
112 static struct scsi_transport_template *qla4xxx_scsi_transport;
113
114 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
115 {
116 struct ddb_entry *ddb_entry = session->dd_data;
117 struct scsi_qla_host *ha = ddb_entry->ha;
118
119 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
120 "secs exhausted, marking device DEAD.\n", ha->host_no,
121 __func__, ddb_entry->fw_ddb_index,
122 ha->port_down_retry_count));
123
124 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
125
126 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
127 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
128 queue_work(ha->dpc_thread, &ha->dpc_work);
129 }
130
131 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
132 {
133 struct iscsi_cls_session *session;
134 struct ddb_entry *ddb_entry;
135
136 session = iscsi_dev_to_session(conn->dev.parent);
137 ddb_entry = session->dd_data;
138
139 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
140 ddb_entry->ha->host_no, __func__,
141 ddb_entry->fw_ddb_index));
142 iscsi_unblock_session(session);
143 return 0;
144 }
145
146 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
147 {
148 struct iscsi_cls_session *session;
149 struct ddb_entry *ddb_entry;
150
151 session = iscsi_dev_to_session(conn->dev.parent);
152 ddb_entry = session->dd_data;
153
154 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
155 ddb_entry->ha->host_no, __func__,
156 ddb_entry->fw_ddb_index));
157 if (flag == STOP_CONN_RECOVER)
158 iscsi_block_session(session);
159 else
160 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
161 }
162
163 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
164 enum iscsi_param param, char *buf)
165 {
166 struct ddb_entry *ddb_entry = sess->dd_data;
167 int len;
168
169 switch (param) {
170 case ISCSI_PARAM_TARGET_NAME:
171 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
172 ddb_entry->iscsi_name);
173 break;
174 case ISCSI_PARAM_TPGT:
175 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
176 break;
177 default:
178 return -ENOSYS;
179 }
180
181 return len;
182 }
183
184 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
185 enum iscsi_param param, char *buf)
186 {
187 struct iscsi_cls_session *session;
188 struct ddb_entry *ddb_entry;
189 int len;
190
191 session = iscsi_dev_to_session(conn->dev.parent);
192 ddb_entry = session->dd_data;
193
194 switch (param) {
195 case ISCSI_PARAM_CONN_PORT:
196 len = sprintf(buf, "%hu\n", ddb_entry->port);
197 break;
198 case ISCSI_PARAM_CONN_ADDRESS:
199 /* TODO: what are the ipv6 bits */
200 len = sprintf(buf, "%u.%u.%u.%u\n",
201 NIPQUAD(ddb_entry->ip_addr));
202 break;
203 default:
204 return -ENOSYS;
205 }
206
207 return len;
208 }
209
210 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
211 uint32_t enable, struct sockaddr *dst_addr)
212 {
213 struct scsi_qla_host *ha;
214 struct Scsi_Host *shost;
215 struct sockaddr_in *addr;
216 struct sockaddr_in6 *addr6;
217 int ret = 0;
218
219 shost = scsi_host_lookup(host_no);
220 if (IS_ERR(shost)) {
221 printk(KERN_ERR "Could not find host no %u\n", host_no);
222 return -ENODEV;
223 }
224
225 ha = (struct scsi_qla_host *) shost->hostdata;
226
227 switch (type) {
228 case ISCSI_TGT_DSCVR_SEND_TARGETS:
229 if (dst_addr->sa_family == AF_INET) {
230 addr = (struct sockaddr_in *)dst_addr;
231 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
232 addr->sin_port) != QLA_SUCCESS)
233 ret = -EIO;
234 } else if (dst_addr->sa_family == AF_INET6) {
235 /*
236 * TODO: fix qla4xxx_send_tgts
237 */
238 addr6 = (struct sockaddr_in6 *)dst_addr;
239 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
240 addr6->sin6_port) != QLA_SUCCESS)
241 ret = -EIO;
242 } else
243 ret = -ENOSYS;
244 break;
245 default:
246 ret = -ENOSYS;
247 }
248
249 scsi_host_put(shost);
250 return ret;
251 }
252
253 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
254 {
255 if (!ddb_entry->sess)
256 return;
257
258 if (ddb_entry->conn) {
259 iscsi_if_destroy_session_done(ddb_entry->conn);
260 iscsi_destroy_conn(ddb_entry->conn);
261 iscsi_remove_session(ddb_entry->sess);
262 }
263 iscsi_free_session(ddb_entry->sess);
264 }
265
266 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
267 {
268 int err;
269
270 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
271 if (err) {
272 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
273 return err;
274 }
275
276 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
277 if (!ddb_entry->conn) {
278 iscsi_remove_session(ddb_entry->sess);
279 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
280 return -ENOMEM;
281 }
282
283 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
284 iscsi_if_create_session_done(ddb_entry->conn);
285 return 0;
286 }
287
288 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
289 {
290 struct ddb_entry *ddb_entry;
291 struct iscsi_cls_session *sess;
292
293 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
294 if (!sess)
295 return NULL;
296
297 ddb_entry = sess->dd_data;
298 memset(ddb_entry, 0, sizeof(*ddb_entry));
299 ddb_entry->ha = ha;
300 ddb_entry->sess = sess;
301 return ddb_entry;
302 }
303
304 /*
305 * Timer routines
306 */
307
308 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
309 unsigned long interval)
310 {
311 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
312 __func__, ha->host->host_no));
313 init_timer(&ha->timer);
314 ha->timer.expires = jiffies + interval * HZ;
315 ha->timer.data = (unsigned long)ha;
316 ha->timer.function = (void (*)(unsigned long))func;
317 add_timer(&ha->timer);
318 ha->timer_active = 1;
319 }
320
321 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
322 {
323 del_timer_sync(&ha->timer);
324 ha->timer_active = 0;
325 }
326
327 /***
328 * qla4xxx_mark_device_missing - mark a device as missing.
329 * @ha: Pointer to host adapter structure.
330 * @ddb_entry: Pointer to device database entry
331 *
332 * This routine marks a device missing and resets the relogin retry count.
333 **/
334 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
335 struct ddb_entry *ddb_entry)
336 {
337 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
338 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
339 ha->host_no, ddb_entry->bus, ddb_entry->target,
340 ddb_entry->fw_ddb_index));
341 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
342 }
343
344 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
345 struct ddb_entry *ddb_entry,
346 struct scsi_cmnd *cmd,
347 void (*done)(struct scsi_cmnd *))
348 {
349 struct srb *srb;
350
351 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
352 if (!srb)
353 return srb;
354
355 atomic_set(&srb->ref_count, 1);
356 srb->ha = ha;
357 srb->ddb = ddb_entry;
358 srb->cmd = cmd;
359 srb->flags = 0;
360 cmd->SCp.ptr = (void *)srb;
361 cmd->scsi_done = done;
362
363 return srb;
364 }
365
366 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
367 {
368 struct scsi_cmnd *cmd = srb->cmd;
369
370 if (srb->flags & SRB_DMA_VALID) {
371 if (cmd->use_sg) {
372 pci_unmap_sg(ha->pdev, cmd->request_buffer,
373 cmd->use_sg, cmd->sc_data_direction);
374 } else if (cmd->request_bufflen) {
375 pci_unmap_single(ha->pdev, srb->dma_handle,
376 cmd->request_bufflen,
377 cmd->sc_data_direction);
378 }
379 srb->flags &= ~SRB_DMA_VALID;
380 }
381 cmd->SCp.ptr = NULL;
382 }
383
384 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
385 {
386 struct scsi_cmnd *cmd = srb->cmd;
387
388 qla4xxx_srb_free_dma(ha, srb);
389
390 mempool_free(srb, ha->srb_mempool);
391
392 cmd->scsi_done(cmd);
393 }
394
395 /**
396 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
397 * @cmd: Pointer to Linux's SCSI command structure
398 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
399 * that the command has been processed.
400 *
401 * Remarks:
402 * This routine is invoked by Linux to send a SCSI command to the driver.
403 * The mid-level driver tries to ensure that queuecommand never gets
404 * invoked concurrently with itself or the interrupt handler (although
405 * the interrupt handler may call this routine as part of request-
406 * completion handling). Unfortunely, it sometimes calls the scheduler
407 * in interrupt context which is a big NO! NO!.
408 **/
409 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
410 void (*done)(struct scsi_cmnd *))
411 {
412 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
413 struct ddb_entry *ddb_entry = cmd->device->hostdata;
414 struct srb *srb;
415 int rval;
416
417 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
418 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
419 cmd->result = DID_NO_CONNECT << 16;
420 goto qc_fail_command;
421 }
422 goto qc_host_busy;
423 }
424
425 spin_unlock_irq(ha->host->host_lock);
426
427 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
428 if (!srb)
429 goto qc_host_busy_lock;
430
431 rval = qla4xxx_send_command_to_isp(ha, srb);
432 if (rval != QLA_SUCCESS)
433 goto qc_host_busy_free_sp;
434
435 spin_lock_irq(ha->host->host_lock);
436 return 0;
437
438 qc_host_busy_free_sp:
439 qla4xxx_srb_free_dma(ha, srb);
440 mempool_free(srb, ha->srb_mempool);
441
442 qc_host_busy_lock:
443 spin_lock_irq(ha->host->host_lock);
444
445 qc_host_busy:
446 return SCSI_MLQUEUE_HOST_BUSY;
447
448 qc_fail_command:
449 done(cmd);
450
451 return 0;
452 }
453
454 /**
455 * qla4xxx_mem_free - frees memory allocated to adapter
456 * @ha: Pointer to host adapter structure.
457 *
458 * Frees memory previously allocated by qla4xxx_mem_alloc
459 **/
460 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
461 {
462 if (ha->queues)
463 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
464 ha->queues_dma);
465
466 ha->queues_len = 0;
467 ha->queues = NULL;
468 ha->queues_dma = 0;
469 ha->request_ring = NULL;
470 ha->request_dma = 0;
471 ha->response_ring = NULL;
472 ha->response_dma = 0;
473 ha->shadow_regs = NULL;
474 ha->shadow_regs_dma = 0;
475
476 /* Free srb pool. */
477 if (ha->srb_mempool)
478 mempool_destroy(ha->srb_mempool);
479
480 ha->srb_mempool = NULL;
481
482 /* release io space registers */
483 if (ha->reg)
484 iounmap(ha->reg);
485 pci_release_regions(ha->pdev);
486 }
487
488 /**
489 * qla4xxx_mem_alloc - allocates memory for use by adapter.
490 * @ha: Pointer to host adapter structure
491 *
492 * Allocates DMA memory for request and response queues. Also allocates memory
493 * for srbs.
494 **/
495 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
496 {
497 unsigned long align;
498
499 /* Allocate contiguous block of DMA memory for queues. */
500 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
501 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
502 sizeof(struct shadow_regs) +
503 MEM_ALIGN_VALUE +
504 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
505 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
506 &ha->queues_dma, GFP_KERNEL);
507 if (ha->queues == NULL) {
508 dev_warn(&ha->pdev->dev,
509 "Memory Allocation failed - queues.\n");
510
511 goto mem_alloc_error_exit;
512 }
513 memset(ha->queues, 0, ha->queues_len);
514
515 /*
516 * As per RISC alignment requirements -- the bus-address must be a
517 * multiple of the request-ring size (in bytes).
518 */
519 align = 0;
520 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
521 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
522 (MEM_ALIGN_VALUE - 1));
523
524 /* Update request and response queue pointers. */
525 ha->request_dma = ha->queues_dma + align;
526 ha->request_ring = (struct queue_entry *) (ha->queues + align);
527 ha->response_dma = ha->queues_dma + align +
528 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
529 ha->response_ring = (struct queue_entry *) (ha->queues + align +
530 (REQUEST_QUEUE_DEPTH *
531 QUEUE_SIZE));
532 ha->shadow_regs_dma = ha->queues_dma + align +
533 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
534 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
535 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
536 (REQUEST_QUEUE_DEPTH *
537 QUEUE_SIZE) +
538 (RESPONSE_QUEUE_DEPTH *
539 QUEUE_SIZE));
540
541 /* Allocate memory for srb pool. */
542 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
543 mempool_free_slab, srb_cachep);
544 if (ha->srb_mempool == NULL) {
545 dev_warn(&ha->pdev->dev,
546 "Memory Allocation failed - SRB Pool.\n");
547
548 goto mem_alloc_error_exit;
549 }
550
551 return QLA_SUCCESS;
552
553 mem_alloc_error_exit:
554 qla4xxx_mem_free(ha);
555 return QLA_ERROR;
556 }
557
558 /**
559 * qla4xxx_timer - checks every second for work to do.
560 * @ha: Pointer to host adapter structure.
561 **/
562 static void qla4xxx_timer(struct scsi_qla_host *ha)
563 {
564 struct ddb_entry *ddb_entry, *dtemp;
565 int start_dpc = 0;
566
567 /* Search for relogin's to time-out and port down retry. */
568 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
569 /* Count down time between sending relogins */
570 if (adapter_up(ha) &&
571 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
572 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
573 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
574 INVALID_ENTRY) {
575 if (atomic_read(&ddb_entry->retry_relogin_timer)
576 == 0) {
577 atomic_set(&ddb_entry->
578 retry_relogin_timer,
579 INVALID_ENTRY);
580 set_bit(DPC_RELOGIN_DEVICE,
581 &ha->dpc_flags);
582 set_bit(DF_RELOGIN, &ddb_entry->flags);
583 DEBUG2(printk("scsi%ld: %s: index [%d]"
584 " login device\n",
585 ha->host_no, __func__,
586 ddb_entry->fw_ddb_index));
587 } else
588 atomic_dec(&ddb_entry->
589 retry_relogin_timer);
590 }
591 }
592
593 /* Wait for relogin to timeout */
594 if (atomic_read(&ddb_entry->relogin_timer) &&
595 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
596 /*
597 * If the relogin times out and the device is
598 * still NOT ONLINE then try and relogin again.
599 */
600 if (atomic_read(&ddb_entry->state) !=
601 DDB_STATE_ONLINE &&
602 ddb_entry->fw_ddb_device_state ==
603 DDB_DS_SESSION_FAILED) {
604 /* Reset retry relogin timer */
605 atomic_inc(&ddb_entry->relogin_retry_count);
606 DEBUG2(printk("scsi%ld: index[%d] relogin"
607 " timed out-retrying"
608 " relogin (%d)\n",
609 ha->host_no,
610 ddb_entry->fw_ddb_index,
611 atomic_read(&ddb_entry->
612 relogin_retry_count))
613 );
614 start_dpc++;
615 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
616 "initate relogin after"
617 " %d seconds\n",
618 ha->host_no, ddb_entry->bus,
619 ddb_entry->target,
620 ddb_entry->fw_ddb_index,
621 ddb_entry->default_time2wait + 4)
622 );
623
624 atomic_set(&ddb_entry->retry_relogin_timer,
625 ddb_entry->default_time2wait + 4);
626 }
627 }
628 }
629
630 /* Check for heartbeat interval. */
631 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
632 ha->heartbeat_interval != 0) {
633 ha->seconds_since_last_heartbeat++;
634 if (ha->seconds_since_last_heartbeat >
635 ha->heartbeat_interval + 2)
636 set_bit(DPC_RESET_HA, &ha->dpc_flags);
637 }
638
639
640 /* Wakeup the dpc routine for this adapter, if needed. */
641 if ((start_dpc ||
642 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
643 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
644 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
645 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
646 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
647 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
648 test_bit(DPC_AEN, &ha->dpc_flags)) &&
649 ha->dpc_thread) {
650 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
651 " - dpc flags = 0x%lx\n",
652 ha->host_no, __func__, ha->dpc_flags));
653 queue_work(ha->dpc_thread, &ha->dpc_work);
654 }
655
656 /* Reschedule timer thread to call us back in one second */
657 mod_timer(&ha->timer, jiffies + HZ);
658
659 DEBUG2(ha->seconds_since_last_intr++);
660 }
661
662 /**
663 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
664 * @ha: Pointer to host adapter structure.
665 *
666 * This routine stalls the driver until all outstanding commands are returned.
667 * Caller must release the Hardware Lock prior to calling this routine.
668 **/
669 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
670 {
671 uint32_t index = 0;
672 int stat = QLA_SUCCESS;
673 unsigned long flags;
674 struct scsi_cmnd *cmd;
675 int wait_cnt = WAIT_CMD_TOV; /*
676 * Initialized for 30 seconds as we
677 * expect all commands to retuned
678 * ASAP.
679 */
680
681 while (wait_cnt) {
682 spin_lock_irqsave(&ha->hardware_lock, flags);
683 /* Find a command that hasn't completed. */
684 for (index = 0; index < ha->host->can_queue; index++) {
685 cmd = scsi_host_find_tag(ha->host, index);
686 if (cmd != NULL)
687 break;
688 }
689 spin_unlock_irqrestore(&ha->hardware_lock, flags);
690
691 /* If No Commands are pending, wait is complete */
692 if (index == ha->host->can_queue) {
693 break;
694 }
695
696 /* If we timed out on waiting for commands to come back
697 * return ERROR.
698 */
699 wait_cnt--;
700 if (wait_cnt == 0)
701 stat = QLA_ERROR;
702 else {
703 msleep(1000);
704 }
705 } /* End of While (wait_cnt) */
706
707 return stat;
708 }
709
710 /**
711 * qla4xxx_soft_reset - performs soft reset.
712 * @ha: Pointer to host adapter structure.
713 **/
714 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
715 {
716 uint32_t max_wait_time;
717 unsigned long flags = 0;
718 int status = QLA_ERROR;
719 uint32_t ctrl_status;
720
721 spin_lock_irqsave(&ha->hardware_lock, flags);
722
723 /*
724 * If the SCSI Reset Interrupt bit is set, clear it.
725 * Otherwise, the Soft Reset won't work.
726 */
727 ctrl_status = readw(&ha->reg->ctrl_status);
728 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
729 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
730
731 /* Issue Soft Reset */
732 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
733 readl(&ha->reg->ctrl_status);
734
735 spin_unlock_irqrestore(&ha->hardware_lock, flags);
736
737 /* Wait until the Network Reset Intr bit is cleared */
738 max_wait_time = RESET_INTR_TOV;
739 do {
740 spin_lock_irqsave(&ha->hardware_lock, flags);
741 ctrl_status = readw(&ha->reg->ctrl_status);
742 spin_unlock_irqrestore(&ha->hardware_lock, flags);
743
744 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
745 break;
746
747 msleep(1000);
748 } while ((--max_wait_time));
749
750 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
751 DEBUG2(printk(KERN_WARNING
752 "scsi%ld: Network Reset Intr not cleared by "
753 "Network function, clearing it now!\n",
754 ha->host_no));
755 spin_lock_irqsave(&ha->hardware_lock, flags);
756 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
757 readl(&ha->reg->ctrl_status);
758 spin_unlock_irqrestore(&ha->hardware_lock, flags);
759 }
760
761 /* Wait until the firmware tells us the Soft Reset is done */
762 max_wait_time = SOFT_RESET_TOV;
763 do {
764 spin_lock_irqsave(&ha->hardware_lock, flags);
765 ctrl_status = readw(&ha->reg->ctrl_status);
766 spin_unlock_irqrestore(&ha->hardware_lock, flags);
767
768 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
769 status = QLA_SUCCESS;
770 break;
771 }
772
773 msleep(1000);
774 } while ((--max_wait_time));
775
776 /*
777 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
778 * after the soft reset has taken place.
779 */
780 spin_lock_irqsave(&ha->hardware_lock, flags);
781 ctrl_status = readw(&ha->reg->ctrl_status);
782 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
783 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
784 readl(&ha->reg->ctrl_status);
785 }
786 spin_unlock_irqrestore(&ha->hardware_lock, flags);
787
788 /* If soft reset fails then most probably the bios on other
789 * function is also enabled.
790 * Since the initialization is sequential the other fn
791 * wont be able to acknowledge the soft reset.
792 * Issue a force soft reset to workaround this scenario.
793 */
794 if (max_wait_time == 0) {
795 /* Issue Force Soft Reset */
796 spin_lock_irqsave(&ha->hardware_lock, flags);
797 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
798 readl(&ha->reg->ctrl_status);
799 spin_unlock_irqrestore(&ha->hardware_lock, flags);
800 /* Wait until the firmware tells us the Soft Reset is done */
801 max_wait_time = SOFT_RESET_TOV;
802 do {
803 spin_lock_irqsave(&ha->hardware_lock, flags);
804 ctrl_status = readw(&ha->reg->ctrl_status);
805 spin_unlock_irqrestore(&ha->hardware_lock, flags);
806
807 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
808 status = QLA_SUCCESS;
809 break;
810 }
811
812 msleep(1000);
813 } while ((--max_wait_time));
814 }
815
816 return status;
817 }
818
819 /**
820 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
821 * @ha: Pointer to host adapter structure.
822 *
823 * This routine is called just prior to a HARD RESET to return all
824 * outstanding commands back to the Operating System.
825 * Caller should make sure that the following locks are released
826 * before this calling routine: Hardware lock, and io_request_lock.
827 **/
828 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
829 {
830 struct srb *srb;
831 int i;
832 unsigned long flags;
833
834 spin_lock_irqsave(&ha->hardware_lock, flags);
835 for (i = 0; i < ha->host->can_queue; i++) {
836 srb = qla4xxx_del_from_active_array(ha, i);
837 if (srb != NULL) {
838 srb->cmd->result = DID_RESET << 16;
839 qla4xxx_srb_compl(ha, srb);
840 }
841 }
842 spin_unlock_irqrestore(&ha->hardware_lock, flags);
843
844 }
845
846 /**
847 * qla4xxx_recover_adapter - recovers adapter after a fatal error
848 * @ha: Pointer to host adapter structure.
849 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
850 * after adapter recovery has completed.
851 * 0=preserve ddb list, 1=destroy and rebuild ddb list
852 **/
853 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
854 uint8_t renew_ddb_list)
855 {
856 int status;
857
858 /* Stall incoming I/O until we are done */
859 clear_bit(AF_ONLINE, &ha->flags);
860 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
861 __func__));
862
863 /* Wait for outstanding commands to complete.
864 * Stalls the driver for max 30 secs
865 */
866 status = qla4xxx_cmd_wait(ha);
867
868 qla4xxx_disable_intrs(ha);
869
870 /* Flush any pending ddb changed AENs */
871 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
872
873 /* Reset the firmware. If successful, function
874 * returns with ISP interrupts enabled.
875 */
876 if (status == QLA_SUCCESS) {
877 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
878 ha->host_no, __func__));
879 qla4xxx_flush_active_srbs(ha);
880 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
881 status = qla4xxx_soft_reset(ha);
882 else
883 status = QLA_ERROR;
884 }
885
886 /* Flush any pending ddb changed AENs */
887 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
888
889 /* Re-initialize firmware. If successful, function returns
890 * with ISP interrupts enabled */
891 if (status == QLA_SUCCESS) {
892 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
893 ha->host_no, __func__));
894
895 /* If successful, AF_ONLINE flag set in
896 * qla4xxx_initialize_adapter */
897 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
898 }
899
900 /* Failed adapter initialization?
901 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
902 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
903 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
904 /* Adapter initialization failed, see if we can retry
905 * resetting the ha */
906 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
907 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
908 DEBUG2(printk("scsi%ld: recover adapter - retrying "
909 "(%d) more times\n", ha->host_no,
910 ha->retry_reset_ha_cnt));
911 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
912 status = QLA_ERROR;
913 } else {
914 if (ha->retry_reset_ha_cnt > 0) {
915 /* Schedule another Reset HA--DPC will retry */
916 ha->retry_reset_ha_cnt--;
917 DEBUG2(printk("scsi%ld: recover adapter - "
918 "retry remaining %d\n",
919 ha->host_no,
920 ha->retry_reset_ha_cnt));
921 status = QLA_ERROR;
922 }
923
924 if (ha->retry_reset_ha_cnt == 0) {
925 /* Recover adapter retries have been exhausted.
926 * Adapter DEAD */
927 DEBUG2(printk("scsi%ld: recover adapter "
928 "failed - board disabled\n",
929 ha->host_no));
930 qla4xxx_flush_active_srbs(ha);
931 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
932 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
933 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
934 &ha->dpc_flags);
935 status = QLA_ERROR;
936 }
937 }
938 } else {
939 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
940 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
941 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
942 }
943
944 ha->adapter_error_count++;
945
946 if (status == QLA_SUCCESS)
947 qla4xxx_enable_intrs(ha);
948
949 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
950 return status;
951 }
952
953 /**
954 * qla4xxx_do_dpc - dpc routine
955 * @data: in our case pointer to adapter structure
956 *
957 * This routine is a task that is schedule by the interrupt handler
958 * to perform the background processing for interrupts. We put it
959 * on a task queue that is consumed whenever the scheduler runs; that's
960 * so you can do anything (i.e. put the process to sleep etc). In fact,
961 * the mid-level tries to sleep when it reaches the driver threshold
962 * "host->can_queue". This can cause a panic if we were in our interrupt code.
963 **/
964 static void qla4xxx_do_dpc(struct work_struct *work)
965 {
966 struct scsi_qla_host *ha =
967 container_of(work, struct scsi_qla_host, dpc_work);
968 struct ddb_entry *ddb_entry, *dtemp;
969
970 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
971 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
972 ha->host_no, __func__, ha->flags, ha->dpc_flags));
973
974 /* Initialization not yet finished. Don't do anything yet. */
975 if (!test_bit(AF_INIT_DONE, &ha->flags))
976 return;
977
978 if (adapter_up(ha) ||
979 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
980 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
981 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
982 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
983 test_bit(DPC_RESET_HA, &ha->dpc_flags))
984 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
985
986 if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
987 uint8_t wait_time = RESET_INTR_TOV;
988 unsigned long flags = 0;
989
990 qla4xxx_flush_active_srbs(ha);
991
992 spin_lock_irqsave(&ha->hardware_lock, flags);
993 while ((readw(&ha->reg->ctrl_status) &
994 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
995 if (--wait_time == 0)
996 break;
997
998 spin_unlock_irqrestore(&ha->hardware_lock,
999 flags);
1000
1001 msleep(1000);
1002
1003 spin_lock_irqsave(&ha->hardware_lock, flags);
1004 }
1005 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1006
1007 if (wait_time == 0)
1008 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1009 "bit not cleared-- resetting\n",
1010 ha->host_no, __func__));
1011 }
1012 }
1013
1014 /* ---- process AEN? --- */
1015 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1016 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1017
1018 /* ---- Get DHCP IP Address? --- */
1019 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1020 qla4xxx_get_dhcp_ip_address(ha);
1021
1022 /* ---- relogin device? --- */
1023 if (adapter_up(ha) &&
1024 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1025 list_for_each_entry_safe(ddb_entry, dtemp,
1026 &ha->ddb_list, list) {
1027 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1028 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1029 qla4xxx_relogin_device(ha, ddb_entry);
1030
1031 /*
1032 * If mbx cmd times out there is no point
1033 * in continuing further.
1034 * With large no of targets this can hang
1035 * the system.
1036 */
1037 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1038 printk(KERN_WARNING "scsi%ld: %s: "
1039 "need to reset hba\n",
1040 ha->host_no, __func__);
1041 break;
1042 }
1043 }
1044 }
1045 }
1046
1047 /**
1048 * qla4xxx_free_adapter - release the adapter
1049 * @ha: pointer to adapter structure
1050 **/
1051 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1052 {
1053
1054 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1055 /* Turn-off interrupts on the card. */
1056 qla4xxx_disable_intrs(ha);
1057 }
1058
1059 /* Kill the kernel thread for this host */
1060 if (ha->dpc_thread)
1061 destroy_workqueue(ha->dpc_thread);
1062
1063 /* Issue Soft Reset to put firmware in unknown state */
1064 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1065 qla4xxx_soft_reset(ha);
1066
1067 /* Remove timer thread, if present */
1068 if (ha->timer_active)
1069 qla4xxx_stop_timer(ha);
1070
1071 /* free extra memory */
1072 qla4xxx_mem_free(ha);
1073
1074 /* Detach interrupts */
1075 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1076 free_irq(ha->pdev->irq, ha);
1077
1078 pci_disable_device(ha->pdev);
1079
1080 }
1081
1082 /***
1083 * qla4xxx_iospace_config - maps registers
1084 * @ha: pointer to adapter structure
1085 *
1086 * This routines maps HBA's registers from the pci address space
1087 * into the kernel virtual address space for memory mapped i/o.
1088 **/
1089 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1090 {
1091 unsigned long pio, pio_len, pio_flags;
1092 unsigned long mmio, mmio_len, mmio_flags;
1093
1094 pio = pci_resource_start(ha->pdev, 0);
1095 pio_len = pci_resource_len(ha->pdev, 0);
1096 pio_flags = pci_resource_flags(ha->pdev, 0);
1097 if (pio_flags & IORESOURCE_IO) {
1098 if (pio_len < MIN_IOBASE_LEN) {
1099 dev_warn(&ha->pdev->dev,
1100 "Invalid PCI I/O region size\n");
1101 pio = 0;
1102 }
1103 } else {
1104 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1105 pio = 0;
1106 }
1107
1108 /* Use MMIO operations for all accesses. */
1109 mmio = pci_resource_start(ha->pdev, 1);
1110 mmio_len = pci_resource_len(ha->pdev, 1);
1111 mmio_flags = pci_resource_flags(ha->pdev, 1);
1112
1113 if (!(mmio_flags & IORESOURCE_MEM)) {
1114 dev_err(&ha->pdev->dev,
1115 "region #0 not an MMIO resource, aborting\n");
1116
1117 goto iospace_error_exit;
1118 }
1119 if (mmio_len < MIN_IOBASE_LEN) {
1120 dev_err(&ha->pdev->dev,
1121 "Invalid PCI mem region size, aborting\n");
1122 goto iospace_error_exit;
1123 }
1124
1125 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1126 dev_warn(&ha->pdev->dev,
1127 "Failed to reserve PIO/MMIO regions\n");
1128
1129 goto iospace_error_exit;
1130 }
1131
1132 ha->pio_address = pio;
1133 ha->pio_length = pio_len;
1134 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1135 if (!ha->reg) {
1136 dev_err(&ha->pdev->dev,
1137 "cannot remap MMIO, aborting\n");
1138
1139 goto iospace_error_exit;
1140 }
1141
1142 return 0;
1143
1144 iospace_error_exit:
1145 return -ENOMEM;
1146 }
1147
1148 /**
1149 * qla4xxx_probe_adapter - callback function to probe HBA
1150 * @pdev: pointer to pci_dev structure
1151 * @pci_device_id: pointer to pci_device entry
1152 *
1153 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1154 * It returns zero if successful. It also initializes all data necessary for
1155 * the driver.
1156 **/
1157 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1158 const struct pci_device_id *ent)
1159 {
1160 int ret = -ENODEV, status;
1161 struct Scsi_Host *host;
1162 struct scsi_qla_host *ha;
1163 struct ddb_entry *ddb_entry, *ddbtemp;
1164 uint8_t init_retry_count = 0;
1165 char buf[34];
1166
1167 if (pci_enable_device(pdev))
1168 return -1;
1169
1170 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1171 if (host == NULL) {
1172 printk(KERN_WARNING
1173 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1174 goto probe_disable_device;
1175 }
1176
1177 /* Clear our data area */
1178 ha = (struct scsi_qla_host *) host->hostdata;
1179 memset(ha, 0, sizeof(*ha));
1180
1181 /* Save the information from PCI BIOS. */
1182 ha->pdev = pdev;
1183 ha->host = host;
1184 ha->host_no = host->host_no;
1185
1186 /* Configure PCI I/O space. */
1187 ret = qla4xxx_iospace_config(ha);
1188 if (ret)
1189 goto probe_failed;
1190
1191 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1192 pdev->device, pdev->irq, ha->reg);
1193
1194 qla4xxx_config_dma_addressing(ha);
1195
1196 /* Initialize lists and spinlocks. */
1197 INIT_LIST_HEAD(&ha->ddb_list);
1198 INIT_LIST_HEAD(&ha->free_srb_q);
1199
1200 mutex_init(&ha->mbox_sem);
1201 init_waitqueue_head(&ha->mailbox_wait_queue);
1202
1203 spin_lock_init(&ha->hardware_lock);
1204
1205 /* Allocate dma buffers */
1206 if (qla4xxx_mem_alloc(ha)) {
1207 dev_warn(&ha->pdev->dev,
1208 "[ERROR] Failed to allocate memory for adapter\n");
1209
1210 ret = -ENOMEM;
1211 goto probe_failed;
1212 }
1213
1214 /*
1215 * Initialize the Host adapter request/response queues and
1216 * firmware
1217 * NOTE: interrupts enabled upon successful completion
1218 */
1219 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1220 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1221 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1222 "(%d)\n", __func__, init_retry_count));
1223 qla4xxx_soft_reset(ha);
1224 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1225 }
1226 if (status == QLA_ERROR) {
1227 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1228
1229 ret = -ENODEV;
1230 goto probe_failed;
1231 }
1232
1233 host->cmd_per_lun = 3;
1234 host->max_channel = 0;
1235 host->max_lun = MAX_LUNS - 1;
1236 host->max_id = MAX_TARGETS;
1237 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1238 host->can_queue = MAX_SRBS ;
1239 host->transportt = qla4xxx_scsi_transport;
1240
1241 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1242 if (ret) {
1243 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1244 goto probe_failed;
1245 }
1246
1247 /* Startup the kernel thread for this host adapter. */
1248 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1249 "qla4xxx_dpc\n", __func__));
1250 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1251 ha->dpc_thread = create_singlethread_workqueue(buf);
1252 if (!ha->dpc_thread) {
1253 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1254 ret = -ENODEV;
1255 goto probe_failed;
1256 }
1257 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1258
1259 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1260 SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha);
1261 if (ret) {
1262 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1263 " already in use.\n", pdev->irq);
1264 goto probe_failed;
1265 }
1266 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1267 host->irq = pdev->irq;
1268 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1269
1270 qla4xxx_enable_intrs(ha);
1271
1272 /* Start timer thread. */
1273 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1274
1275 set_bit(AF_INIT_DONE, &ha->flags);
1276
1277 pci_set_drvdata(pdev, ha);
1278
1279 ret = scsi_add_host(host, &pdev->dev);
1280 if (ret)
1281 goto probe_failed;
1282
1283 /* Update transport device information for all devices. */
1284 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1285 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1286 if (qla4xxx_add_sess(ddb_entry))
1287 goto remove_host;
1288 }
1289
1290 printk(KERN_INFO
1291 " QLogic iSCSI HBA Driver version: %s\n"
1292 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1293 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1294 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1295 ha->patch_number, ha->build_number);
1296
1297 return 0;
1298
1299 remove_host:
1300 qla4xxx_free_ddb_list(ha);
1301 scsi_remove_host(host);
1302
1303 probe_failed:
1304 qla4xxx_free_adapter(ha);
1305 scsi_host_put(ha->host);
1306
1307 probe_disable_device:
1308 pci_disable_device(pdev);
1309
1310 return ret;
1311 }
1312
1313 /**
1314 * qla4xxx_remove_adapter - calback function to remove adapter.
1315 * @pci_dev: PCI device pointer
1316 **/
1317 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1318 {
1319 struct scsi_qla_host *ha;
1320
1321 ha = pci_get_drvdata(pdev);
1322
1323 /* remove devs from iscsi_sessions to scsi_devices */
1324 qla4xxx_free_ddb_list(ha);
1325
1326 scsi_remove_host(ha->host);
1327
1328 qla4xxx_free_adapter(ha);
1329
1330 scsi_host_put(ha->host);
1331
1332 pci_set_drvdata(pdev, NULL);
1333 }
1334
1335 /**
1336 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1337 * @ha: HA context
1338 *
1339 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1340 * supported addressing method.
1341 */
1342 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1343 {
1344 int retval;
1345
1346 /* Update our PCI device dma_mask for full 64 bit mask */
1347 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1348 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1349 dev_dbg(&ha->pdev->dev,
1350 "Failed to set 64 bit PCI consistent mask; "
1351 "using 32 bit.\n");
1352 retval = pci_set_consistent_dma_mask(ha->pdev,
1353 DMA_32BIT_MASK);
1354 }
1355 } else
1356 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1357 }
1358
1359 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1360 {
1361 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1362 struct ddb_entry *ddb = sess->dd_data;
1363
1364 sdev->hostdata = ddb;
1365 sdev->tagged_supported = 1;
1366 scsi_activate_tcq(sdev, sdev->host->can_queue);
1367 return 0;
1368 }
1369
1370 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1371 {
1372 sdev->tagged_supported = 1;
1373 return 0;
1374 }
1375
1376 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1377 {
1378 scsi_deactivate_tcq(sdev, 1);
1379 }
1380
1381 /**
1382 * qla4xxx_del_from_active_array - returns an active srb
1383 * @ha: Pointer to host adapter structure.
1384 * @index: index into to the active_array
1385 *
1386 * This routine removes and returns the srb at the specified index
1387 **/
1388 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1389 {
1390 struct srb *srb = NULL;
1391 struct scsi_cmnd *cmd;
1392
1393 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1394 return srb;
1395
1396 if (!(srb = (struct srb *)cmd->host_scribble))
1397 return srb;
1398
1399 /* update counters */
1400 if (srb->flags & SRB_DMA_VALID) {
1401 ha->req_q_count += srb->iocb_cnt;
1402 ha->iocb_cnt -= srb->iocb_cnt;
1403 if (srb->cmd)
1404 srb->cmd->host_scribble = NULL;
1405 }
1406 return srb;
1407 }
1408
1409 /**
1410 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1411 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1412 * @cmd: Scsi Command to wait on.
1413 *
1414 * This routine waits for the command to be returned by the Firmware
1415 * for some max time.
1416 **/
1417 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1418 struct scsi_cmnd *cmd)
1419 {
1420 int done = 0;
1421 struct srb *rp;
1422 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1423
1424 do {
1425 /* Checking to see if its returned to OS */
1426 rp = (struct srb *) cmd->SCp.ptr;
1427 if (rp == NULL) {
1428 done++;
1429 break;
1430 }
1431
1432 msleep(2000);
1433 } while (max_wait_time--);
1434
1435 return done;
1436 }
1437
1438 /**
1439 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1440 * @ha: Pointer to host adapter structure
1441 **/
1442 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1443 {
1444 unsigned long wait_online;
1445
1446 wait_online = jiffies + (30 * HZ);
1447 while (time_before(jiffies, wait_online)) {
1448
1449 if (adapter_up(ha))
1450 return QLA_SUCCESS;
1451 else if (ha->retry_reset_ha_cnt == 0)
1452 return QLA_ERROR;
1453
1454 msleep(2000);
1455 }
1456
1457 return QLA_ERROR;
1458 }
1459
1460 /**
1461 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1462 * @ha: pointer to to HBA
1463 * @t: target id
1464 * @l: lun id
1465 *
1466 * This function waits for all outstanding commands to a lun to complete. It
1467 * returns 0 if all pending commands are returned and 1 otherwise.
1468 **/
1469 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1470 int t, int l)
1471 {
1472 int cnt;
1473 int status = 0;
1474 struct scsi_cmnd *cmd;
1475
1476 /*
1477 * Waiting for all commands for the designated target in the active
1478 * array
1479 */
1480 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1481 cmd = scsi_host_find_tag(ha->host, cnt);
1482 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1483 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1484 status++;
1485 break;
1486 }
1487 }
1488 }
1489 return status;
1490 }
1491
1492 /**
1493 * qla4xxx_eh_device_reset - callback for target reset.
1494 * @cmd: Pointer to Linux's SCSI command structure
1495 *
1496 * This routine is called by the Linux OS to reset all luns on the
1497 * specified target.
1498 **/
1499 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1500 {
1501 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1502 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1503 struct srb *sp;
1504 int ret = FAILED, stat;
1505
1506 sp = (struct srb *) cmd->SCp.ptr;
1507 if (!sp || !ddb_entry)
1508 return ret;
1509
1510 dev_info(&ha->pdev->dev,
1511 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1512 cmd->device->channel, cmd->device->id, cmd->device->lun);
1513
1514 DEBUG2(printk(KERN_INFO
1515 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1516 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1517 cmd, jiffies, cmd->timeout_per_command / HZ,
1518 ha->dpc_flags, cmd->result, cmd->allowed));
1519
1520 /* FIXME: wait for hba to go online */
1521 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1522 if (stat != QLA_SUCCESS) {
1523 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1524 goto eh_dev_reset_done;
1525 }
1526
1527 /* Send marker. */
1528 ha->marker_needed = 1;
1529
1530 /*
1531 * If we are coming down the EH path, wait for all commands to complete
1532 * for the device.
1533 */
1534 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1535 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1536 cmd->device->id,
1537 cmd->device->lun)){
1538 dev_info(&ha->pdev->dev,
1539 "DEVICE RESET FAILED - waiting for "
1540 "commands.\n");
1541 goto eh_dev_reset_done;
1542 }
1543 }
1544
1545 dev_info(&ha->pdev->dev,
1546 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1547 ha->host_no, cmd->device->channel, cmd->device->id,
1548 cmd->device->lun);
1549
1550 ret = SUCCESS;
1551
1552 eh_dev_reset_done:
1553
1554 return ret;
1555 }
1556
1557 /**
1558 * qla4xxx_eh_host_reset - kernel callback
1559 * @cmd: Pointer to Linux's SCSI command structure
1560 *
1561 * This routine is invoked by the Linux kernel to perform fatal error
1562 * recovery on the specified adapter.
1563 **/
1564 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1565 {
1566 int return_status = FAILED;
1567 struct scsi_qla_host *ha;
1568
1569 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1570
1571 dev_info(&ha->pdev->dev,
1572 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1573 cmd->device->channel, cmd->device->id, cmd->device->lun);
1574
1575 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1576 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1577 "DEAD.\n", ha->host_no, cmd->device->channel,
1578 __func__));
1579
1580 return FAILED;
1581 }
1582
1583 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1584 return_status = SUCCESS;
1585 }
1586
1587 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1588 return_status == FAILED ? "FAILED" : "SUCCEDED");
1589
1590 return return_status;
1591 }
1592
1593
1594 static struct pci_device_id qla4xxx_pci_tbl[] = {
1595 {
1596 .vendor = PCI_VENDOR_ID_QLOGIC,
1597 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1598 .subvendor = PCI_ANY_ID,
1599 .subdevice = PCI_ANY_ID,
1600 },
1601 {
1602 .vendor = PCI_VENDOR_ID_QLOGIC,
1603 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1604 .subvendor = PCI_ANY_ID,
1605 .subdevice = PCI_ANY_ID,
1606 },
1607 {
1608 .vendor = PCI_VENDOR_ID_QLOGIC,
1609 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1610 .subvendor = PCI_ANY_ID,
1611 .subdevice = PCI_ANY_ID,
1612 },
1613 {0, 0},
1614 };
1615 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1616
1617 struct pci_driver qla4xxx_pci_driver = {
1618 .name = DRIVER_NAME,
1619 .id_table = qla4xxx_pci_tbl,
1620 .probe = qla4xxx_probe_adapter,
1621 .remove = qla4xxx_remove_adapter,
1622 };
1623
1624 static int __init qla4xxx_module_init(void)
1625 {
1626 int ret;
1627
1628 /* Allocate cache for SRBs. */
1629 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1630 SLAB_HWCACHE_ALIGN, NULL, NULL);
1631 if (srb_cachep == NULL) {
1632 printk(KERN_ERR
1633 "%s: Unable to allocate SRB cache..."
1634 "Failing load!\n", DRIVER_NAME);
1635 ret = -ENOMEM;
1636 goto no_srp_cache;
1637 }
1638
1639 /* Derive version string. */
1640 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1641 if (ql4xextended_error_logging)
1642 strcat(qla4xxx_version_str, "-debug");
1643
1644 qla4xxx_scsi_transport =
1645 iscsi_register_transport(&qla4xxx_iscsi_transport);
1646 if (!qla4xxx_scsi_transport){
1647 ret = -ENODEV;
1648 goto release_srb_cache;
1649 }
1650
1651 ret = pci_register_driver(&qla4xxx_pci_driver);
1652 if (ret)
1653 goto unregister_transport;
1654
1655 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1656 return 0;
1657
1658 unregister_transport:
1659 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1660 release_srb_cache:
1661 kmem_cache_destroy(srb_cachep);
1662 no_srp_cache:
1663 return ret;
1664 }
1665
1666 static void __exit qla4xxx_module_exit(void)
1667 {
1668 pci_unregister_driver(&qla4xxx_pci_driver);
1669 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1670 kmem_cache_destroy(srb_cachep);
1671 }
1672
1673 module_init(qla4xxx_module_init);
1674 module_exit(qla4xxx_module_exit);
1675
1676 MODULE_AUTHOR("QLogic Corporation");
1677 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1678 MODULE_LICENSE("GPL");
1679 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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